We have set a new build for Mac OS X as default. This new build is a 64-bit, signed app that should work on Macs that were upgraded to the new Catalina version of the OS.
If you are running an older Mac that does not support 64-bit apps, an older build is available in the following way: go to Library -> Unity of Command -> Properties -> BETA and opt into the beta named "beta".
If you are installing for the first time, and you're asked to enter a product key, CMD-TAB to Steam, then go to:
Library -> Unity of Command -> (right-click) View CD Key
Please copy/paste the keys from here. We apologize for this inconvenience, but this is an older piece of code and we are still working out how to remove this procedure.
https://store.steampowered.com/app/809230/Unity_of_Command_II/
Unity of Command is an innovative and refreshing operational-level wargame that covers the entire 1942/43 Stalingrad Campaign on the Eastern Front. Playable from both the Axis and Soviet perspective, it strives to recreate the strategy, the forces involved and the general tension of that crucial period in World War II.
Experience the highly fluid, enormously large battles of maneuver in a turn-based strategy setting. Take command in this mobile, back-and-forth sort of war where logistics and poor weather are often the decider, and defeat and victory are sometimes just a mile, or a day, apart.